Portable lap desk



FIG. 1 is a perspective view of the portable lap desk showing my new design;

FIG. 2 is a front view of the portable lap desk;

FIG. 3 is a back view of the portable lap desk;

FIG. 4 is a top view of the portable lap desk;

FIG. 5 is a bottom view of the portable lap desk;

FIG. 6 is a right side view of the portable lap desk; and,

FIG. 7 is a left side view of the portable lap desk. 

The ornamental design for a portable lap desk, as shown. 